Date: Mon, 13 Aug 2001 03:25:37 -0400 From: Sean Davis <dive-fb@endersgame.net> To: freebsd-questions@freebsd.org Subject: microuptime() oddness Message-ID: <20010813032537.A10782@endersgame.net>
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Hello, I have a machine (AMD Athlon 1.2ghz, 256MB ram) running
FreeBSD-stable, and have been noticing a lot of weird kernel debug messages
like:
microuptime() went backwards (7467.677311 -> 7467.-694689197)
microuptime() went backwards (7718.041075 -> 7718.-695325418)
calcru: negative time of -1984434482 usec for pid 365 (setiathome)
calcru: negative time of -1984434287 usec for pid 365 (setiathome)
calcru: negative time of -1984434107 usec for pid 365 (setiathome)
calcru: negative time of -1984433927 usec for pid 365 (setiathome)
<repeat many, many times>
Does anyone have any idea whats causing this?
The microuptime() thing has been happening ever since the box was first
installed, at which time it was running 4.3-RELEASE. The calcru stuff has
been happening since I started running seti@home on it.
I think the two are related.
The box's dmesg follows:
Copyright (c) 1992-2001 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
The Regents of the University of California. All rights reserved.
FreeBSD 4.4-PRERELEASE #4: Sun Aug 5 21:21:51 MDT 2001
cheyan@straylight.endersgame.net:/usr/src/sys/compile/ANNE
Timecounter "i8254" frequency 1193182 Hz
CPU: AMD Athlon(tm) Processor (1200.05-MHz 686-class CPU)
Origin = "AuthenticAMD" Id = 0x642 Stepping = 2
Features=0x183f9ff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR>
AMD Features=0xc0440000<<b18>,AMIE,DSP,3DNow!>
real memory = 268369920 (262080K bytes)
avail memory = 258437120 (252380K bytes)
Preloaded elf kernel "kernel" at 0xc02dd000.
Preloaded userconfig_script "/boot/kernel.conf" at 0xc02dd09c.
Pentium Pro MTRR support enabled
npx0: <math processor> on motherboard
npx0: INT 16 interface
pcib0: <Host to PCI bridge> on motherboard
pci0: <PCI bus> on pcib0
pcib1: <AcerLabs M5247 PCI-PCI(AGP Supported) bridge> at device 1.0 on pci0
pci1: <PCI bus> on pcib1
pci1: <ATI model 5144 graphics accelerator> at 0.0 irq 10
atapci0: <AcerLabs Aladdin ATA33 controller> port 0xe000-0xe00f at device
4.0 on pci0
ata0: at 0x1f0 irq 14 on atapci0
ata1: at 0x170 irq 15 on atapci0
isab0: <AcerLabs M1533 portable PCI-ISA bridge> at device 7.0 on pci0
isa0: <ISA bus> on isab0
rl0: <RealTek 8139 10/100BaseTX> port 0xe400-0xe4ff mem
0xde001000-0xde0010ff irq 10 at device 12.0 on pci0
rl0: Ethernet address: 00:c0:f0:8b:08:9d
miibus0: <MII bus> on rl0
rlphy0: <RealTek internal media interface> on miibus0
rlphy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, auto
pcm0: <CMedia CMI8738> port 0xe800-0xe8ff irq 11 at device 15.0 on pci0
chip1: <AcerLabs M15x3 Power Management Unit> at device 17.0 on pci0
orm0: <Option ROM> at iomem 0xc0000-0xcbfff on isa0
fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
fdc0: FIFO enabled, 8 bytes threshold
fd0: <1440-KB 3.5" drive> on fdc0 drive 0
atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
atkbd0: <AT Keyboard> flags 0x1 irq 1 on atkbdc0
kbd0 at atkbd0
psm0: <PS/2 Mouse> irq 12 on atkbdc0
psm0: model IntelliMouse, device ID 3
vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
sc0: <System console> at flags 0x100 on isa0
sc0: VGA <16 virtual consoles, flags=0x300>
sio0 at port 0x3f8-0x3ff irq 4 flags 0x10 on isa0
sio0: type 16550A
sio1 at port 0x2f8-0x2ff irq 3 on isa0
sio1: type 16550A
ppc0: <Parallel port> at port 0x378-0x37f irq 7 on isa0
ppc0: Generic chipset (EPP/NIBBLE) in COMPATIBLE mode
ppbus0: IEEE1284 device found /NIBBLE/ECP
Probing for PnP devices on ppbus0:
ppbus0: <HEWLETT-PACKARD DESKJET 930C> MLC,PCL,PML
lpt0: <Printer> on ppbus0
lpt0: Interrupt-driven port
ppi0: <Parallel I/O> on ppbus0
ad0: 39266MB <IC35L040AVER07-0> [79780/16/63] at ata0-master UDMA100
acd0: CD-RW <TOSHIBA DVD-ROM SD-R1102> at ata1-master using PIO4
Mounting root from ufs:/dev/ad0s2a
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